• Rob Delaney signed with the Twins in 2006 after going undrafted out of St. John's University and his numbers were always far better than his raw stuff, so they viewed his success in the minors very skeptically and didn't give him a chance in the majors until a week before his 26th birthday. Delaney made just one appearance in a month with the Twins, serving up a homer to Ian Kinsler of the Rangers on September 4, and Thursday he was designated for assignment.

It's no shock that the Twins ditched Delaney before ever giving him an extended opportunity, because he's been sort of like a poor man's Anthony Slama and they haven't seemed all that inclined to give the actual Anthony Slama a lengthy look. It's also no shock that Delaney was claimed off waivers by the Rays, whose front office relies way more on statistical analysis than the Twins' decision-makers.

Delaney's numbers went from amazing in the low minors to merely solid in the high minors. He pitched well in two seasons at Triple-A with a 130-to-38 strikeout-to-walk ratio in 128 innings, but his ERA was an unremarkable 4.65 thanks to serving up 17 homers. He's racked up lots of strikeouts with a repertoire headed by his low-90s fastball and has excellent control with just 1.9 walks per nine innings.

As a fly-ball pitcher with so-so raw stuff Delaney has little margin for error and the Twins were certainly right to view his success skeptically when it comes to translating to the big leagues, but he was worth giving a chance to considering the question mark-filled bullpen. Tampa Bay is in a very similar situation, needing to replace most of what was a fantastic bullpen following free agent departures, and Delaney is capable of being a solid middle reliever for the Rays.

• Delaney was dropped from the 40-man roster because the Twins needed to clear room after claiming Dusty Hughesoff waivers from the Royals. He spent most of last year in Kansas City's bullpen, posting a nice-looking 3.83 ERA in 56 innings, but the 29-year-old left-hander also had a terrible 34-to-24 strikeout-to-walk ratio and wasn't particularly effective against lefties (.260) or righties (.283) while allowing opponents to bat .273/.351/.380 off him overall.

Hughes is left-handed and had a superficially strong ERA last year, but there isn't a whole lot else to like about him. Hughes was even older than Delaney when he debuted in September of 2009 and unlike Delaney his minor-league numbers have never been impressive. In two years at Triple-A he had a 4.10 ERA and 112-to-66 strikeout-to-walk ratio in 143 innings and his raw stuff is hardly special, as Hughes averaged just 90.2 miles per hour with his fastball.

Much like their decision to give a 40-man roster spot to Giants castoff Eric Hacker after signing him to a minor-league deal in November, losing Delaney to add Hughes to the 40-man roster is an odd move that seems predicated on looking at the wrong numbers. Hacker had 16 wins at Triple-A last year, but it came with a 4.51 ERA, sub par secondary numbers, and a track record full of mediocrity from a 28-year-old.

In this case Hughes' nice-looking 3.83 ERA caught the Twins' eye (and being left-handed surely helped too), but he needed an awful lot of smoke and mirrors just to have modest success for 56 innings and brings with him a similarly uninspiring history of mediocrity in the minors at age 29. Delaney isn't a huge loss and would've placed near the bottom of my annual ranking of the Twins' top 40 prospects, but picking Hacker and Hughes over giving him a shot is unfortunate.

• One of the misconceptions about park factors is that the dimensions of the field determine if a ballpark skews pitcher-friendly or hitter-friendly. In reality the dimensions definitely play a big role, but the run-scoring environment is also greatly impacted by other stuff like wind patterns, humidity, playing surfaces, and hitting backgrounds. Target Field was pitcher-friendly in its first year of existence, for a number of reasons, and the Twins have decided to make one change.

Hitters complained that the trees planted behind the wall in center field hurt their ability to see pitches, particularly in day games, so the Twins will remove them and install a new background designed to reduce glare. Obviously not being able to see pitches is something that had to be addressed, but it'll be interesting to find out what the overall impact ends up being considering the Twins went 53-28 at Target Field and actually scored more runs there than on the road.

• Matt Capps ($7.15 million), Kevin Slowey ($2.7 million), Alexi Casilla ($865,000), and Glen Perkins ($700,000) have each avoided arbitration with one-year deals, leaving Delmon Young and Francisco Liriano as the unsigned arbitration eligible players. Young filed for $6.25 million, compared to $4.65 million by the Twins. Liriano filed for $5 million, compared to $3.6 million by the Twins. No player has gone to a hearing with the Twins since Kyle Lohse in 2005 and 2006.

• Much has been made about Bert Blyleven needing to wait 14 years before baseball writers voted him into the Hall of Fame, but he's also had to wait those same 14 years for the Twins to retire his number, which they'll officially do on July 16. Blyleven, who has the most strikeouts in Twins history and ranks second to Jim Kaat in wins and innings, will join Harmon Killebrew, Kirby Puckett, Rod Carew, Tony Oliva, and Kent Hrbekin the retired numbers club.

Get the 22nd edition of the New York Times bestselling Baseball Prospectus Annual. Edited by Aaron Gleeman, it features a foreword from Twins pitcher Glen Perkins, a Twins team chapter written by Gleeman and Parker Hageman, and 600 pages of analysis, projections, essays, rankings, and in-depth coverage of all 30 teams.